MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1b99d542585cfe7f449e616bb3767a50dd997bdbd9e0aa15724453235cfcb7b7. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Formbook


Vendor detections: 13


Intelligence 13 IOCs YARA 2 File information Comments
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SHA256 hash: 1b99d542585cfe7f449e616bb3767a50dd997bdbd9e0aa15724453235cfcb7b7
SHA3-384 hash: f68867af35ee2f7df256b91d1cf8930fb2afe60e4cf6a83c230cd266d8b56c7774d7b9e840ce8ccebffe11af06b80b95
SHA1 hash: 1c58ddc4c8805fbb5df9f385d0b0e085b163bc34
MD5 hash: 166d8cc8c3f069ad2c87c27e7ada3c8f
humanhash: mockingbird-enemy-illinois-undress
File name:166d8cc8c3f069ad2c87c27e7ada3c8f.exe
Download: download sample
Signature Formbook
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File size:1'030'144 bytes
First seen:2022-02-16 19:05:43 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'597 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:TiWyFaL6bHiou/5CEONJ5Gim7m0o1rIn5mg3vWSRJ:fyEoMJOz5Am1m5m6lRJ
Threatray 13'587 similar samples on MalwareBazaar
TLSH T1F1250269B963DE11C5382A73D8DFC03643E86A696733EA392DD4338C09427E719741BE
File icon (PE):PE icon
dhash icon 00b271f0f079f2c0 (15 x AgentTesla, 8 x Loki, 4 x Formbook)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
247
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/242037/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1197.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control.exe obfuscated packed replace.exe update.exe
Link:
https://www.filescan.io/uploads/620d4b27875593a3ccd8b2ab/reports/127a6207-4efa-4f6d-b91b-4b9afbf3384a/overview
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e4b1ea2f-38fd-44e3-9ab2-1703696234d1
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/941137
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 573615 Sample: 1wXijDaW17.exe Startdate: 16/02/2022 Architecture: WINDOWS Score: 100 31 canonicalizer.ucsuri.tcs 2->31 33 Multi AV Scanner detection for domain / URL 2->33 35 Found malware configuration 2->35 37 Malicious sample detected (through community Yara rule) 2->37 39 9 other signatures 2->39 11 1wXijDaW17.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\1wXijDaW17.exe.log, ASCII 11->29 dropped 49 Tries to detect virtualization through RDTSC time measurements 11->49 51 Injects a PE file into a foreign processes 11->51 15 1wXijDaW17.exe 11->15         started        signatures6 process7 signatures8 53 Modifies the context of a thread in another process (thread injection) 15->53 55 Maps a DLL or memory area into another process 15->55 57 Sample uses process hollowing technique 15->57 59 Queues an APC in another process (thread injection) 15->59 18 explorer.exe 15->18 injected process9 process10 20 raserver.exe 18->20         started        signatures11 41 Self deletion via cmd delete 20->41 43 Modifies the context of a thread in another process (thread injection) 20->43 45 Maps a DLL or memory area into another process 20->45 47 Tries to detect virtualization through RDTSC time measurements 20->47 23 cmd.exe 1 20->23         started        25 explorer.exe 103 20->25         started        process12 process13 27 conhost.exe 23->27         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/1b99d542585cfe7f449e616bb3767a50dd997bdbd9e0aa15724453235cfcb7b7/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-02-16 02:41:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
280a181eae2d790e6992653b19b216b9407a948f42d32db3ad78e81660ff1f8c
Formbook
5de06778dd414ee2cc418f089914bb7a656ccf854a30a004d286599cda4c4013
Formbook
8e133618d88f4eb1975953fc0ef639a7192f7fea403f5a777a698a4631f741a6
Formbook
9bceb9680d39094087add5289a7e19aa93168faf9c5f2465700b117d59e8d841
Formbook
acb28239c256d400e79f51a7f83036d19daa0d814d32dcf765d8ec9aa0293cea
Formbook
b9eab20f9cbbaae84e47a46b7f38bba153868c53b9b71765af05866707b48c38
Formbook
caf586c9d78e7b0adc9d91286228eba817463d60b912651f2aa43288441d4d48
Formbook
ccf47d9fd0a0ddce06c265b87f0e2377bb58107c18659ac908b7e3a5731ad081
Formbook
dc6b59f8711b0312ed522ef0eb3d4e115b03f1159ed462ba356036644b4f787b
Formbook
fa3b721595b9e5571bcfd42767aa563f6e363a3fff9e9cdbfb525d0f28e62eb7
Formbook
+ 13'577 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:u6f8 loader rat
Link:
https://tria.ge/reports/220216-xr3dqacbb4/
Behaviour
Checks processor information in registry
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Drops file in Windows directory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Unpacked files
SH256 hash:
ea838e0384811cc8fe8b402800db2c4e6d245b8fa7e19be75598b1acfcaf8e27
MD5 hash:
fbc09d4966f3efeaa13409622e7de925
SHA1 hash:
6181388dbff60fe021269c931054283129e99010
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/9517ee21-bc2a-4363-af11-2e17ae15235b/
Parent samples :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 hash:
63b6403c6ea1378c0ff49f069597b45496dba6c0161d240e64885ab6f0806d04
MD5 hash:
72b143fd989c37772556bf302ac33be1
SHA1 hash:
ee377db4778e70261d34f8210208069df41a12ef
Link:
https://www.unpac.me/results/9517ee21-bc2a-4363-af11-2e17ae15235b/
SH256 hash:
329ced60d22e882fc322287fd1743db115ffde9a5854835a6fc8919cf950b803
MD5 hash:
4c64b5932edcdacb01008e75f5ff8c5d
SHA1 hash:
a74aa0282974b14abfffed2bf3b24fe832c3fb9a
Link:
https://www.unpac.me/results/9517ee21-bc2a-4363-af11-2e17ae15235b/
SH256 hash:
cefd17ec19903cc5d433b5525647cf0cabd8946e7f7977ddf33becedb92a9575
MD5 hash:
507481c6ad1e2d4c82a65d16534f8023
SHA1 hash:
06d0fa9c1c71d9da685b519f9ca7728a7370e258
Link:
https://www.unpac.me/results/9517ee21-bc2a-4363-af11-2e17ae15235b/
SH256 hash:
1b99d542585cfe7f449e616bb3767a50dd997bdbd9e0aa15724453235cfcb7b7
MD5 hash:
166d8cc8c3f069ad2c87c27e7ada3c8f
SHA1 hash:
1c58ddc4c8805fbb5df9f385d0b0e085b163bc34
Link:
https://www.unpac.me/results/9517ee21-bc2a-4363-af11-2e17ae15235b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/1b99d542585cfe7f449e616bb3767a50dd997bdbd9e0aa15724453235cfcb7b7

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Formbook

Executable exe 1b99d542585cfe7f449e616bb3767a50dd997bdbd9e0aa15724453235cfcb7b7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2035729/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/242037/

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